Earth boring and drilling machine



(No Model.)

-W'. E. EVERITT.

EARTH BORING'AND DBILLING MAGHINE.

Patented Aug. 8, 1893'.

Inventor.

jWtnesses;

UNTTED STATES` PATENT CEETCE. v

WALTER EvEEITT, oE BUFFALO, NEW YORK.

EARTH BORING vAND DRILLING MACHINE.

SPECIFICATION forming part of Letters Patent No. 502,958,'dated August 8, 1893.

Appncaaon sied April 172.1e03. serai no. 470.006. tn'inoaei.) Y

.To a/ZZ whom t may concern.-

Be it known that I, WALTER E. EVEEITT, a citizen of theUnited States, residingin Buffalo, in the county of Erie and State of New York, have invented certain new and useful Improvements in Earth Boring and Drilling Machines, of which the following is a specification.

My invention relates to certain improve-y ments in machines for ooringlongY distances horizontally or at any angle through the earth, and it vwill-be fully and clearly herein?y after described and claimed, reference being had to the accompanying drawings, iny

Whichcomplete. Fig. 2, is a `plan view of the machine showing also the removable device at"I the front of the same that is used when withdrawing the auger or boring tool, a small portion being in section, showing also the coni necting extension bars. Y Fig. 3, represents a5 vertical section cutting through line a a Fig., 1, showing the crank arm and gearing near. Fig. 4, is a back? view of thedrill operating mechanism at the rear of thel machine, showing also the rear'j end of the base and slideways, all portions?y beyond it being omitted. Fig. 5, is an enlarged detached front elevation of the froutv box and sleeve through which the screw shaft Fig. 6 is a top view of the same, showi ing the way in which the upper half of Athef the rear of the machine.

passes.

screw sleeve is secured to it. Fig. 7, is a side cured together.

The base 1, of the machine is a hat plate of iron, either cast or wrought iron and isi provided with slideways 2 and 2, one on each` side of thetop of thel base plate. These slideways may be made removable if desiredv and secured to the base plate by ordinary screw bolts, 3, or they can be cast in one piece with the base plate. ted a plate, 4, shown in Figs. 2, 3 and 4.. Near the one end of the plate, 4, is rigidly securedz two upright frame pieces 5 and 5, and near the opposite end of said plate is a substantially upright supporting frame piece, 6. The

In these slideways is t- 1 vthe upper half, 11, has a longitudinal movement inthe top cap, 12, and is kept thereto by a screw, 13, which passes through the slot, 14, in the cap, see Figs. 5 and 6, and screws Y into the upper half of the sleeve, thereby se- Figure 1 is a side elevation of the machine curing it to the cap, 12, and permitting it to be moved ashort distance longitudinally back and forth within the cap. The object of this 7o construction will appear farther on.

Near the rear end of thej screw shaft, 7, and between the frame pieces 5 and 5,is rigidly secured to said shaft, 7,in any well known way,

a spur gear wheel, 15. Abovethe spur gear, 15, and engaging with it is another spur gear wheel, 16. This gear wheel, 16, is rigidly secured to a. stud` or, short shaft, 17, which is mounted in a removable box which is shown in Fig. 3, and designated by the numeral, 18. 8o The box is kept in place by caps, 19, and bolts, 19, and a set screw 20, provides the means for holding the box down and the two gear wheels in gear, against the force of a spiral spring, 21, which tends to hold the box 1S up. 85 On the short shaft, 17, is a crank arm and handle, 22, by which the boring tool and gearing is operated. The upper gear wheel 16, is (as will be noticed) made easily removable by means of the boxes, 18.

The screw-shaft, 7, is provided with ascrew thread which passes through a corresponding screw thread in the sleeve 11 and 11awhich sleeve being mounted in the rstationary support 10, and havingtheV collars, 5G and 5f, is 95 held stationary while boring through the ground or comparatively soft earth'by the collar 5f, as the support 10, against which the collar 5f is forced is stationary, said support 10 being rigidly secured tothe base plate l.

From the above construction it will be seen that by turning the crank arm in the proper direction, the gear wheel, 16, turns the gear wheel, 15, and consequently the shaft 7, which IOC operation causes the said shaft, 7, to screw through the sleeve ll. and ll, and draws the plate, 4, its frames 5 and 5, and all parts connected with it forward until the frame, 5a, reaches the collar, 5.

On the front end of the boring or screw shaft, 7, is secured by the usual screw portion, either an earth boring auger bar, 23, or any suitable tool for drilling rock, (for which this device is adapted) when a large stone or rock happens to be in the way while boring into the earth. These earth boring auger bars, 23, may be made in sections secured together so as to be extensible to any practicable length, substantially as shown in Fig. 8. When gas pipe is used for extending the anger they are secured together substantially as shown in Fig. 7, by means of the usual screw portion, 24, the extensible bars being designated by the numerals, 25, in said Fig. 7.

It will be noticed that the cap, l2, is pivoted by a pin, 26, to the supporting frame piece, 10, which cap, 2, can be turned up by loosening the thumb screw 27 as shown by the dotted lines, 12C, in Fig. 5, so that the sleeve, 11, is` lifted away from the screw shaft, 7, thereby` allowing said shaft to be raised out of the screw thread in the sleeve, 1l, and then drawn blow or a succession of blows as the drill is` being slowly turned is required for drilling through rock.

The rear portion of the sliding plate, 4, (or it may be properly called a carriage) is provided with a vertical standard, 2S, rigidly secured thereto and moving with said plate when the machine is operating. At the top of the standard 28, is pivoted by a pin, 29, a swinging arm, 30, having at its free end a hammer, 3l, of some softer material than the rear end, 32, of the screw bar, 7 ,such as brass,`

copper or soft iron. This hammer is kept forward, (and the effect of its blow is increased) by a spiral spring, (Shown in Fig. l.)

Projecting out from the frame piece, 5, is a supporting arm, 34, having a box 3S, in which is mounted a shaft, 35, provided with a spur gear wheel, 36, which gears in with the wheel, 15. This gear wheel, 36, is secured to the shaft, 35, by a set screw, 37, see Fig. l which can be loosened so that said wheel will run loosely on said shaft when it is desired to disengage said shaft, 35, and its gear wheel 3G, so that it will not be operated while the machine is used for boring soft earth. Near the opposite end, said shaft, 35, is mounted in a box on the standard, G, which is also secured rigidly to the plate, 4, or carriage and moves with it, and at the end of the shaft, 35, is rigidly secureda cam wheel 39, and extending around near the edge of said wheel (on its face) is an inclined cam. This rotating cam starts at the point, 40, (see Fig. 4,) and gradually inclines upward to the point,4l. (If desired more than one cam of this kind can bc puton the same wheel.) On the arm, 30, is a small friction roller, 42, (see Fig. l) which rests against the face of the cam.

From the above construction it will be seen that if the cam be made to rotate (during the operation of the machine) as it passes the friction roller, 42, the hammer will be moved backward from the end, 32, of the shaft, 7, until the point 41 is passed, when it is instantly released and the hammer strikes a blow on the end 32 of the shaft, 7, thereby driving the drill against the rock and cutting it in the usual way. )Vlien thus operating vwith the drill, it can be slowly turned by the crank arm, 22. The force of the concussion does not come on the sliding plate, 4, or its supporting frames, because the collar 5c, and its sleeve ll and 11a, allows the shaft 7, and its drill to be driven forward at least a half inch more or less without interfering with the supporting frames and the moment the force of the blow ceases the spiral spring, 8, brings it back to the starting point.

The operation of the device will be clearly understood from the foregoing description and drawings.

When it is desired to withdraw the extension bars and drill the device shown at the front end of the machine (in Fig. 2) is used. It consists of the two holding hook jaws 43 and 43, which are pivoted by pins, 44, to the swivel 45. This swivel is secured in the holding piece, 4G, so as to turn easily therein and is kept in place by the swivel head, 47. The holding piece, 46, is provided with an internal screw threaded portion adapted to re ceive either the screw end of an extension bar or the end of the augur or grinding tool. The hook portions when attached as shown in Fig. 2, are rigidly secured to the part, 47 by the thumb screw, 48. By this means the extension pieces and the auger portion or drill can be withdrawn without unscrewing the connecting portions by reversing the action of the screw bar, 7, as will be readily understood.

I claim as my inventionl. In an earth boring machine, the combination with a screw bar, 7, having its rear end extending back beyond the frame in which it is mounted, of a collar1 5c, located on the screw bar at the front of the supporting frame, a spiral spring at the rear of the supporting frame, 5, for holding the screw bar back until stopped by the collar 5C, a sliding carriage on which the rear end of the screw bar'and its operating gearing is mounted in a suitable frame adapted to receive it, a longitudinally TOO IIO

movable screw threaded sleeve mounted in a stationary support at the front of the machine in which the screw bar operates and moves said carriage, a spur gear wheel adapted to gear in with the screw bar gear Wheel and secured to a horizontal shaft mounted in suitable boxes on the sliding carriage, a pivoted swinging hammer mounted on a support on said sliding carriage, a spiral spring for drawing it forward and a cam wheel on the horizontal shaft for operating said hammer, substantially as and for the purposes described.

2. In a boring machine, the combination with the screw bar, 7, of a removable holding swivel consisting of two pivoted holding hook bars, a thumb screw for securing them whenv placed on the front of the screw bar and a means secured by a swivel to the hook bars and provided with an internal screw thread adapted to receive-the screw end of the eX- tension auger boring bar, as and for the purposes described.

3. In an earth boring machine, the combination with the screw bar, 7, having its front end mounted so as to operate in a screw sleeve connected with a stationary support, and its rear end mounted so as to turn in a supporting frame mounted on a movable carriage adapted tol be drawn forward by said screw bar, '7,- a gear wheel mounted and rigidly secured on said screw bar, 7, and connecting with another gear wheel mounted above it in the same frame, means for operatingl it, and a gear wheel secured to a horizontal shaft so as to gear in with the gear wheel on the screw shaft and mounted in boxes in a frame rigidly secured to the sliding carriage, a cam wheel, 39, connected to the opposite end of said shaft and means for releasing said wheel from the horizontal shaft to stop the operation of the said cam wheel and hammer, 31,

substantially as described.

. WALTER E. EVERITT.

Witnesses:

J. M. CALDWELL, JAMES SANGSTER. 

